Telegraphy.



N' 757,505. PATENTED APR. 19-,- 1904.

H. 0. RUGH.

TELEGRAPHY. AIIPLIOATIVOH FILED we. 31, 190s.

I0 IODEL.

me nonms PETERS 00.. Warnin vusnmm 0. cv

No. cameos.

UNITED STAT S Patented April 19,

PATENT OE IcE.

RAPHONE COMPANY, SOUTH DAKOTA.

OF CHICAGO, ILLINOIS, A CORPORATION OF TELEGRAPHY.

SPECIFICATION forming part of Letters Patent No. 757,505, dated A ril19, 1904.

Application filed August 31,1903. Serial No. 171,400. (No model.)

To all whown it may concern.-

Be itknown that I, HARRY O. RUGH, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Telegraphy, of whichthe following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to telegraphy, and has for its object the provisionof an improved system and apparatus whereby wave-form current asalternating current of suitably high frequency may be employed ineffecting telegraphic signals. By means of my invention the sametelegraphic circuit may be simultaneously employed for both wave-formanddirect telegraphic currents. To this end I have devised apparatus atthe stations employing the instruments to be operated by wave-formcurrent that will effectively respond to the wave-form current at thereceiving-stations and which will also be operated at thesending-station without unduly weakening the current, the systemenabling the substantially uniform operation of the sounder at thereceiving and sending stations.

My invention will be fully pointed out in the following specificationand claims and illustrated in the accompanying drawings, in which Figure1 illustrates the preferred embodiment of the invention. Fig. 2 is aview in elevation of the sounder.

Like parts are indicated by similar characters of reference in bothviews.

I have indicated a transmission-line 1, common to a plurality oftelegraphic stations 2, 3, 4, 5, and 6. It is understood that the number of each kind of stations may be varied.

dance 11 may be included in the line if said linerelays do not oflerenough to prevent undue leakage of wave-form current.

I have indicated the apparatus at stations 3, 4, and 5 in groundedconductors 12, each containing a condenser 13. At each of these stationsthere is a line-relay 14:, each preferrent caused by the battery 8 thatmay find path through the'condensers 12 to the relays 14 will fail tocause effective operation of said relays, because the contact 20 ismaintained in engagement with the diaphragm not only by reason of theweighted arm, but also by the adjusting-spring 20, that serves toregulate the degree of pressure of the contact against the diaphragm. Wave-form current of sufficiently high frequency, however, will causeseparation between thevibratory and traveling contact elements.

At each station there is a sounder 21 contained in a local circuitincluding the contacts 16 and 17 and a battery 22. Whenever waveformtelegraphic current is impressed upon the line relays atreceiving-stations, the contacts 16 and 17 are separated. The preferredsource of wave-form current is an alternatingcurrent generator 22, onegenerator being in dicated at each of the stations 3, 4, and 5. It is ofcourse only necessary to have wires carrying the wave-form currentpresent at'each station to act as a supply irrespective of the locationof the generator supplying said wires.

A sending-key or switching mechanism 23 I is located at each of thestations 3, 4, and 5,

whose normal contact normally completes the relay-circuit to ground, theground connection being by way of said key, which is preferablyconstantly grounded. The alternate contact of said key constitutes aterminal vof the supply of wave-form current. when said key isdepressed, the magnet of the relay 14 is cut out of circuit. In orderthat the wave-form current impressed upon the line at a sendingstationmay operate the sounder to the satisfaction of the sender, I have hereinprovided an electromagnet 24: at each station that is ineluded incircuit with the source of wave-form current at a sending-station. Thiselectromagnet when energized by outgoing waveform current attracts itsarmature away from the normal contact 25 to open the soundercircuit thatalso contains said armature with its contact, whereby the operator getshis own sending. In order that a sound occasioned by the release of thesounder-armature may be totally distinct from that occasioned by itsattraction, I provide a sound-'dampener 26, that is engaged by thearmature-screw 27 upon the attraction of said armature.

It is obvious that changes may be made in the embodiment of theinvention herein shown a without departing from the spirit of theinvention.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent, the following:

1. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a sending-key or switching mechanism at each station; aline-relay at each station comprising a permanent magnet as a core forthe helix of the relay, a vibratory contact element actuated by themagnet of the relay, and a traveling contact element possessing inertiaand normally resting against said vibratory contact element butseparable therefrom through the agency of wave-form current impressedupon the relay; a telegraphic sounder at each station, and a circuit ateach station including said sounder and the contacts of the relay,substantially as described.

2. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station comprising a permanent magnet asacore for the helix of the relay, a vibratory contact element actuatedby the magnet of the relay, and a traveling contact element possessinginertia and normally resting against said vibratory contact element butseparable therefrom through the agency of wave-form current impressedupon the relay; a telegraphic sounder at each station; a circuit at eachstation controlling the sounder thereat and normally closed through thecontacts of the relay, a sending-key or switching mechanism at eachstation, and means at each station controlled by the sending-key orswitching mechanism thereat and operating independently of theline-relay magnet for effecting operation of the sounder at asending-station, substantially as described.-

3. A system of telegraphy comprising a transmission-line uniting aplurality of tele graph-stations; a supply of wave-form current at eachstation; a sending-key or switching mechanism at each station; a linerelay at each station comprising a permanent magnet as a core for thehelix of the relay, a vibratory contact element actuated by the magnetof the relay, and a traveling contact element possessing inertia andnormally resting against said vibratory contact element but separabletherefrom through the agency of wave-form current impressed upon therelay; a telegraphic sounder at each station; a circuit at each stationcontrolling the sounder thereat and normally closed through the-contactsof the relay, an electromagnet at each station having circuitconnections controlled by the sending-key or switching mechanism thereatand operating independently of the line-relay magnet for efiectingoperation of the sounder at a sending-station, substantially asdescribed.

4. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, a vibratory contact element actuated bythe magnet of the relay, and a traveling contact element possessinginertia and normally resting against said vibratory contact element butseparable therefrom through the agency of wave-form current impressedupon the relay; a telegraphic sounder at each station; a circuit at eachstation containing said sounder and the contacts of said relay, asending-key or switching mechanism at each station, an electromagnetcontrolling connections of said sounder to deenergize the same when saidelectromagnet is energized, said electromagnet being adapted forinclusion in circuit with the source of supply through the agency ofsaid key or switching mechanism, substantially as described.

5. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; asupply of wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, a vibratory contact element actuated bythe magnet of the relay, and

a traveling contact elementpossessing inertia and normally restingagainst said vibratory contact element but separable therefrom throughthe agency of wave-form current impressed upon the relay; a telegraphicsounder at each station; a circuit at each station con taining saidsounder and said contacts, a sending-key or switching mechanism at eachstation, an electromagnet included by said key or switching mechanism incircuit with the supply of wave-form current at a sending-station and aswitch controlled by said electromagnet and normally forming a part ofthe soundercircuit and operated upon the energization of theelectromagnet by the Wave-form current to open the sounder-circuit,substantially as described.

6. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-station's; a supply of wave-form current at eachstation; a line-relay at each station including a vibratory contactelement actuated by the magnet of the relay, and a traveling contactelement possessing inertia and normally resting against said vibratorycontact element but separable therefrom through the agancy of wave-formcurrent impressed upon the relay; a telegraphic sounder at each station;a circuit at each station controlling the sounder thereat, and normallyclosed through the contacts of the relay, a sending key or switchingmechanism, and means at each station controlled by the sending-key orswitching mechanism thereat and operating independently of theline-relay magnet for effecting operation of the sounder at asendingstation, substantially as described.

7. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station including a vibratory contactelement actuated by the magnet of the relay, and a'traveling contactelement possessing inertia and normally resting against said vibratorycontact element but separable therefrom through the agency of wave-formcurrent impressed upon the relay; a telegraphic sounder ateach' station;a circuit at each station controlling the sounder thereat, and normallyclosed through the contacts of the relay, a sendingkey or switchingmechanism, an electromagnet at each station having circuit connectionscontrolled by the sending-key or switching mechanism thereat andoperating independentlyof the line-relay magnet for effecting operationof the sounder at a sending-station, substantially as described.

8. A system ,of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station including a vibratory contactelement actuated by the magnet of the relay, and a traveling contactelement possessing inertia and normally resting against said vibratorycontact element but separable therefrom through the agency of wave-formcurrent impressed upon the relay; a telegraphic sounder at each station;a circuit at each station containing said sounder and the contacts ofthe relay, a sending-key or switching mechanism at each station, anelectromagnet controlling connections of said sounder to deenergize thesame when said electromagnet is energized, said electromagnet beingadapted for inclusion in circuit with the source of supply through theagency of said key or switching mechanism, substantially as described.

9. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at eachstation including a vibratory contactelement actuated by the magnet of the relay, and a traveling contactelement possessing inertia and normally resting against said vibratorycontact element but separable therefrom through the agency of wave-formcurrent impressed upon the relay; a telegraphic sounder at each station;a circuit at each station containing said sounder and said contacts, asending-key or switching mechanism at each station, an electromagnetincluded by said key or switching mechanism in circuit with the supplyof wave-form current at a sending-station, and a switch controlled bysaid electromagnet and normally forming apart of the sounder-circuit andoperated upon the energization of the electromagnet by the wave-formcurrent to open the sounder-circuit, substantially as described.

10. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of Wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, a vibratory contact element actuated bythe magnet of the relay, and a traveling contact element possessinginertia and normally resting against the aforesaid contact element butseparable therefrom through the agency of wave-form current impressedupon the relay; a circuit at each station including said contactelements, and a telegraph-sounder in said Cl1CHil3,Sl1bstantially asdescribed.

11. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, a vibratory contact element actuated bythe magnet of the relay, and a traveling contact element possessinginertia and normally resting against the aforesaid contact element butseparable therefrom through the agency of wave-form current impressedupon the relay; a circuit at each station including said contactelements, and atelegraph-sounder in said circuit, and means whereby theoutgoing Wave-form current at a sending-station will effect theoperation of the telegraphic sounder at said station, substantially asdescribed.

12. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, two contact elements normally inengagement controlled by the line-relay; a circuit at each stationincluding said elements, a telegraph-sounder controlled by said circuit,key sending mechan-' ism and an electromagnet controlled by the IIO keysending mechanism for operating the sounder independently of theline-relay, substantially as described. I

13. A system of telegraphy comprising a transmission-line uniting aplurality of telegraph-stations; a supply of Wave-form current at eachstation; a line-relay at each station comprising a permanent magnet as acore for the helix of the relay, tWo contact elements controlled by theline-relay; a circuit at each station including said elements, atelegraph-sounder controlled by said circuit, key sending mechanism andan electromagnet controlled by the key sending mechanism for operatingthe sounder independently of the linerelay, substantially as described.

14. A system of telegraphy comprising a' transmission-line uniting aplurality of telegraph-stations; a supply of Wave-form current at'eachstation, a line-sound-controlling magnet-or'relay at'each stationcomprising a permanent magnet as a core for the'helix of the relay, keysending mechanism, and a relay receiving outgoing current supplement-

